Lock



FIG. 1 is a front perspective view of the lock showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left end view thereof;

FIG. 5 is a right end view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The portions showing phantom lines are not part of the claimed invention, but are included to show environment. 

The ornamental design for a lock, as shown and described. 